376
FXUS65 KBYZ 040647
AFDBYZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
1247 AM MDT FRI SEP 4 2026
KEY MESSAGES
- ELEVATED TO CRITICAL FIRE WEATHER CONDITIONS TODAY.
- TURNING COOLER AND WETTER LATE SUNDAY INTO EARLY NEXT WEEK.
DISCUSSION
NEXT 7 DAYS (THROUGH THURSDAY)...
THE MAIN CONCERN TODAY WILL AGAIN BE CRITICAL FIRE WEATHER
CONDITIONS, HOWEVER, THE FOCUS HAS SHIFTED TO SOUTHEAST MONTANA
AND PORTIONS OF WYOMING. HIGH TEMPERATURES WILL BE WELL INTO THE
90S WITH MINIMUM DAYTIME HUMIDITIES IN THE TEENS. WINDS WILL BE
BREEZY OUT OF THE SOUTH TO SOUTHWEST, WITH THE HIGHEST GUSTS
AROUND 25 TO 35 MPH OVER THE BIGHORN MOUNTAINS AND NEAR THE
DAKOTA BORDER. A RED FLAG WARNING IS IN EFFECT FROM 9 AM TO 9 PM
MDT TODAY FOR THESE AREAS. FIRE WEATHER CONDITIONS REMAIN ELEVATED
FOR THE REST OF THE CWA, WITH HIGHS IN THE LOW 80S TO LOW 90S.
HUMIDITIES WILL BE A LITTLE HIGHER AND WIND GUSTS A LITTLE LOWER
THAN OVER SOUTHEASTERN MONTANA. TAKE CARE NOT TO CAUSE A SPARK!
CONDITIONS WILL REMAIN HOT AND MOSTLY DRY INTO SATURDAY BUT A
CHANGE TO SURFACE WINDS OUT OF THE EAST SHOULD ALLOW MINIMUM
DAYTIMES HUMIDITIES TO REMAIN MOSTLY IN THE 20S AND 30S PERCENT.
THE NEXT BEST CHANCE FOR PRECIPITATION (40-90%) ARRIVES LATE
SUNDAY INTO MONDAY AS AN UPPER LEVEL TROUGH MOVES ACROSS THE
REGION AND PWATS INCREASE TO 170-210% OF NORMAL. WITH THIS, ANY
SHOWER OR THUNDERSTORM WILL BE CAPABLE OF PRODUCING POCKETS OF
HEAVY RAIN. THE ARRIVAL OF THIS TROUGH WILL ALSO ALLOW
TEMPERATURES TO COOL, WITH HIGHS IN THE 70S OVER THE WEST TO 80S
OVER THE EAST BY MONDAY.
INTO THE MIDDLE OF NEXT WEEK, THE PATTERN LOOKS TO REMAIN
UNSETTLED. THIS WOULD ALLOW FOR TEMPERATURES TO REMAIN NEAR
NORMAL (70S) AND A LOW CHANCE (10-30%) FOR DAILY SHOWERS AND
THUNDERSTORMS. ARCHER
AVIATION
06Z AVIATION DISCUSSION...VFR CONDITIONS WILL PREVAIL THROUGH
FRIDAY EVENING. LLWS IS IN THE FORECAST FOR SE MONTANA, INCLUDING
KMLS TAF THROUGH MID MORNING, FOR SOUTHEASTERLY WINDS 30-40KTS
@2KFT AGL. FROM LATE MORNING INTO THE AFTERNOON, MIXING WILL BRING
DOWN GUSTS IN THE 20-30KT RANGE ACROSS THE AREA OUT OF A
SOUTHERLY DIRECTION. BY LATE AFTERNOON WIND DIRECTION WILL SHIFT
MORE WESTERLY THEN NORTHWESTERLY HEADING INTO THE EVENING. COOLING
TEMPERATURES AROUND 00-02Z WILL DECOUPLE MIXING AND WINDS WILL
SUBSIDE DURING THE EVENING HOURS. WILDFIRES FROM N. ROSEBUD COUNTY
EAST ALONG US-12 INTO FALLON COUNTY MAY BRING PERIODS OF
GENERALLY LIGHT SMOKE TO THAT AREA THROUGH THE MORNING HOURS,
MIXING OUT BY MID TO LATE MORNING. SLANT RANGE VISIBILITY WILL BE
REDUCED AT TIMES DUE TO THE SMOKE AS WELL. CHAMBERS
PRELIMINARY POINT TEMP/POPS
TDY SAT SUN MON TUE WED THU
-------------------------------------------------------
BIL 092 056/085 059/083 060/081 054/076 051/079 054/082
0/U 00/U 00/B 74/T 30/U 00/B 20/B
LVM 083 047/083 047/080 048/074 042/073 042/077 045/080
0/U 00/U 01/U 85/T 30/N 02/W 11/B
HDN 095 052/088 055/086 058/084 049/079 046/080 049/083
0/U 00/U 00/U 54/T 41/U 00/B 20/B
MLS 096 059/090 062/087 063/084 054/077 049/077 050/081
0/U 00/U 11/U 74/T 51/N 00/B 00/B
4BQ 097 060/091 062/088 065/087 056/080 051/081 053/084
0/U 00/U 01/U 61/B 20/U 00/B 10/B
BHK 098 059/095 060/090 059/088 052/080 045/079 047/083
0/N 00/U 12/W 74/T 41/N 00/U 11/B
SHR 094 054/088 054/085 057/084 046/078 044/079 048/082
0/U 00/U 00/U 42/T 10/U 00/B 01/B
BYZ WATCHES/WARNINGS/ADVISORIES
MT...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 9 PM MDT
THIS EVENING FOR ZONES 129-131>133.
WY...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 9 PM MDT
THIS EVENING FOR ZONES 274-284.
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